A Basic Alert Dialog

AlertDialog.Builder builder = new AlertDialog.Builder(context);
//Set Title
builder.setTitle("Reset...")
//Set Message
.setMessage("Are you sure?")
//Set the icon of the dialog
.setIcon(drawable)
//Set the positive button, in this case, OK, which will dismiss the dialog and do everything in the onClick method
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// Reset
}
});
AlertDialog dialog = builder.create();
//Now, any time you can call on:
dialog.show();
//So you can show the dialog.